from osgeo import ogr
ring = ogr.Geometry(ogr.wkbLinearRing)
ring.AddPoint(119.5,35.5)
ring.AddPoint(119.6,35.5)
ring.AddPoint(119.6,35.6)
ring.CloseRings()
polygon = ogr.Geometry(ogr.wkbPolygon)
polygon.AddGeometry(ring)

print(polygon.ExportToWkt())